LABORATORY SUPPLIES AND CHEMICALS 



303 



4094 



4094 TUBES, Combustion, porcelain, suitable for high temperature work. Specify 

 glazing desired. 



Size number 



Outside diameter, mm 10 



Inside diameter, mm 6 



Length, mm 1000 



Each $5.60 



If longer or shorter lengths are required add or subtract .01 of price 

 for each centimeter. 



11.20 14.00 



4095 



4095 TUBES, Pyrometer, porcelain, closed on one end, suitable for high tempera- 

 ture work. Specify glazing desired. 



Outside diameter, mm 12,5 17 



Inside diameter, mm 10,5 12 



Length, mm 1000 1000 



Each $7.00 7.70 



If longer or shorter lengths are required add or subtract .01 of price for 

 each centimeter. 



4097 



4097 TUBE, Combustion, Vitrified Clay, Johnson's. For combustions in carbon 

 determinations in steels and alloys. Tube only, 24 inches long. For 

 use in electrically heated furnaces only $5.00 



4097(a) TUBE, Separate Tapered End, 4^ inches long with slip-over connection. . 2.00 



4099 



4099 TUBES, Fused Silica, very refractory, unaffected by rapid and extreme 

 changes of temperature, in lengths up to 8 feet. 

 Bore, inches. 



Per foot $0.45 



Bore, inches 1/2 



Per foot $1.50 



.75 



.90 1.10 



Above can be closed at one end at slight additional cost. 



1.75 2.10 2.30 



1.25 



1 



2.50 



4099 (a) TUBES, Combustion, made of pure fused silica, with reduced end. 



Length, inches 24 30 24 30 24 30 



Bore, inches Y* 1 A 14, 7 A 1 1 



Unqlazed, net $5.20 6.25 5.60 6.75 6.25 7.50 



Glazed, net 6.20 7.50 6.60 8.00 7.75 9.40 



